25284137 has 4 divisors (see below), whose sum is σ = 25307220. Its totient is φ = 25261056.

The previous prime is 25284109. The next prime is 25284139. The reversal of 25284137 is 73148252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23464336 + 1819801 = 4844^2 + 1349^2 .

It is a cyclic number.

It is not a de Polignac number, because 25284137 - 2¹⁰ = 25283113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25284139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9812 + ... + 12117.

It is an arithmetic number, because the mean of its divisors is an integer number (6326805).

Almost surely, 2^25284137 is an apocalyptic number.

It is an amenable number.

25284137 is a deficient number, since it is larger than the sum of its proper divisors (23083).

25284137 is a wasteful number, since it uses less digits than its factorization.

25284137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23082.

The product of its digits is 13440, while the sum is 32.

The square root of 25284137 is about 5028.3334217214. Note that the first 3 decimals coincide. The cubic root of 25284137 is about 293.5053655423.

The spelling of 25284137 in words is "twenty-five million, two hundred eighty-four thousand, one hundred thirty-seven".